%0 Journal Article %A G. V. Kuz'mina %T On the extremal properties of quadratic differentials with strip domains in the structure of trajectories %J Zapiski Nauchnykh Seminarov POMI %D 1986 %P 110-129 %V 154 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1986_154_a9/ %G ru %F ZNSL_1986_154_a9